1 files changed, 27 insertions, 0 deletions
diff --git a/lib/gitlab/ci/config/entry/validatable.rb b/lib/gitlab/ci/config/entry/validatable.rb
new file mode 100644
index 00000000000..f7f1b111571
--- /dev/null
+++ b/lib/gitlab/ci/config/entry/validatable.rb
@@ -0,0 +1,27 @@
+module Gitlab
+  module Ci
+    class Config
+      module Entry
+        module Validatable
+          extend ActiveSupport::Concern
+
+          class_methods do
+            def validator
+              @validator ||= Class.new(Entry::Validator).tap do |validator|
+                if defined?(@validations)
+                  @validations.each { |rules| validator.class_eval(&rules) }
+                end
+              end
+            end
+
+            private
+
+            def validations(&block)
+              (@validations ||= []).append(block)
+            end
+          end
+        end
+      end
+    end
+  end
+end